docs: def GetEntry(self, entry):
          """
          Get an entry. Tree collections are reset
          (see ``rootpy.tree.treeobject``)
  
          Parameters
          ----------
          entry : int
              entry index
  
          Returns
          -------
          ROOT.TTree.GetEntry : int
              The number of bytes read
          """
          if not (0 <= entry < self.GetEntries()):
              raise IndexError("entry index out of range: {0:d}".format(entry))
          self._buffer.reset_collections()
          return super(BaseTree, self).GetEntry(entry)